Skyscanner - Skyscanner.com compares over 1000 airlines to find you the cheapest airfares, fast.
City Guesser - City Guesser is a GeoGuessr alternative that uses real city footage. Get dropped into a random city and use surroundings like moving vehicles, people walking, and language to help you guess your location.
GetLost - Deals on empty airline seats for spontaneous travelers
GuessWhere Challenge - GuessWhere Challenge is a geo-guess quiz game where the user will be sent to a random place (city, country, street.) around the world, and he needs to guess where he is at the moment.
bliss - For music lovers, having an enormous selection of music on your computer is a no-brainer. Whether it's to help you get through work or charge through a work-out, you have music readily on hand. Read more about bliss.
BigDataCloud.com - Essential APIs for eCommerce, ads, finance, CRM: IP Geolocation, Reverse Geocoding, Email/Phone Verification, Network APIs. Enhance user experience, data accuracy, and operational efficiency.